Time controlled demothizing device



Dec. 1, 1953 Filed Jan. 6, 1951 M. ABRAMS TIME CONTROLLED DEMOTHIZINGDEVICE IIllM/l/l/l/f/ 2 Sheets-Sheet 1 INVENTOR. MAURICE ABBA MsJammy/v5) Dec. 1, 1953 M. ABRAMS TIME CONT ROLLED DEMOTHIZING DEVICE 2Sheets-Sheet 2 Filed Jan. 6, 1951 i I I I l wm a \33' l 5 .E. MAW

INVENTOR MAURICE ABRAMS ATT/J/YNE'Y Patented Dec. 1, 1953 UNITED STATESPATENT OFFICE TIME CONTROLLED DEMOTHIZING. DEVICE Maurice Abrams, Newm'lNsJi Applicationlanuary 6,.1951, Seri.al No. 2114,7763

3;: Claims. 1

This invention relates to new and useful improvements in means forprotecting suchitems as. clothing, furniture, rugs, from tombs, eggs;larvae the like.

Such means are known which employ a chemi cal, electrically heatedtoprovide an insecticide vapor. One fault with devices ofthis type;how'- ever, is that the user connects the same to a source of electricalpower, places the same in a closet or the like, then forgets about thedevice. This, of course, results in overheating oi the device and damageto it or to the articles being demothed.

One object of the invention is the provision of such a devicehavingneans-to cut off the-supply" of electrical power to the heatingmeans automatically after a predetermined period of time Another objectof the invention: is to construct arrange the unit so that. the timingdevice, the chemical supply and the-heating element all are contained inan easily portable. unit adapted to be placed '1 theifloor-of a closetvor the like.

Still another object of the invention is the provision of mounting:means: for the heating. unit which: include safeguardsagainstoverheating of the. power cutoiij device For further comprehension of?the invention, and of; the objects and advantages thereoi. ref-- erencewill be; to. following description and accompanying drawings, and". tothe ten ed. claims in which the various novel fear of: the invention aremore particularly set In the accompanying drawings. forming materialpartof this disclosure:

Fig, l perspective; view of the: device oi. the iin ention, particularlyillustrating the heating unit.

Fig. is a perspective View of the; deviceparticular illustrating; thepowercutoilz 3 is a plan view ofthe device is. a vertical sectional Viewalong line ll of. 3

's a horizontal sectional view along line H in Fig. 6 is; enlarged,fragmentary plan; view illustrating a slightly modified construction.

Fig. 7 is a fragmentary, vertical sectional view on line'L-l of- Fig. 6

Fig. 8 is a vertical center sectional view of a modified form of thedevice.

Fig. 9 is an enlargedsectionalview of a portion of Fig. 8.

The time. controlled demothiz-ing device; according to the first form ofthe present invention shown in Figs. 1 to includes a box: I10 ofsuitable plastic material supported onstubby legs or blocks 1!. Circularopenings L2. and I3 are provided in the top and bottom respectively ofthe box, the former to receive! a heating container. unit it for thefilmi'gant chemical, and the latter a timing unit f5.

Container M comprises: inner and outer shells i5 and I? secured togetherat their edges by rolling or? the like; The side portions of inner shell136 are located some distanceirom those of the outer shell F7 and a,heating coil 13 is located the space therebctween. Suitable electricleads Z-ll and 21 extend from coil l8 through a suitable opening 22in-tl ie outer shell IT.

As shown, the inner shell It contains a quantity of normally solidfumigant chemical 23 which when heated gives off a vapor deadly tomoths; the like. Preferably paradichlorobenzene which has amelting pointof about 55 C. is employed;

The timing device i5 is of. the usual construction and. includes a plate24' having time period indiciav thereon, a pointer. 25 rotatable aboutsaid. dial. face, a pair; of spaced frame plates. 26 located within thebox 10' and: spaced by bolts 21:, a spring. motor :28 and gearing 381'mounted between said; frame plates, and an electrical: contact unit, 29-operated. in accordance with the; setting; of: said. pointer. The timingdevice is secured in the. box ill by means of a pair boltsil: located.inopposite diagonal corners of the: bore andextending through the topoithe latter where: they are: engagedby nuts 32. The bolts. 3 l: engage.-opposite ends of a strap 31 which is; secured; to diagonally oppositecorners of the uppermost. timer. frame: plate 2% by nuts. threaded onto?upward extensions of, the apprapriatebolts 211;. Preferably, insulativewashers Siareplacedbetween thestrap 3i and the frame plate. 26- and:lock. nuts 36 are; provided on the bolts 3.!- at; the; strap 33:. Theportion of strap 33- between: the; nuts 34; is." arched, upwardlyserves. as. a limit or. seat for the heat container Us. Atop. the. box:ill the bolts 3| have loosely mounted: thereon below the. nuts 32 each ait! which extends up: over the rim. of. com tainer M, which rim it will.be. noted overlaps the lip of opening l2.

It-will be. seen; therefore, that. the bolts 31 and nuts 32 serve tosecure both the. timer [5- the. heating, container M. in. the box ill,but that, by manipulationof the fingers the latter can be. removed.from. the box. without disturbing the fixed state of the; iormer andalso. thatv the upward arch oi the center of, strap effectively spaces,the heater Hi. from the. delicatev springs and gearing of the timer i5:which might be damaged. by, excessive overheating...

The.- electric. leads; an. and El from. the heater coil ['8 areconnected respectively to: the timer contact unit. 29. and to. one leadof a two lead cord 35 which extends through opening iii in the. sidewalloi box. Iii. to, an ordinary plug 4 A lead 20 connects the opposite sideof contact unitZElI with the second lead. of cord 38.

The operation of the device is as follows:

The box It] is placed. in a. closet or other place to. be. d'emothedand. the outlet cord 38. connected to a suitable source of electricpower such as a aeo cac wall socket. The pointer 25 then is rotated anamount appropriate to the time for which it is desired that heater coil18 operate. As soon as the chemical 23. becomes sufliciently heated itgives off moth-killing vapor until the timing device turns oil theheating unit. 8

It will be seen, therefore, that the device of the invention, once set,can be forgotten in safety.

If desired, each of the fingers 3'! may be provided with a tail 42 asshown in Figs. 6 and 7 to facilitate rotation of the finger to freeheating unit it 1. or removal from the box.

The modification of the invention shown in 8 and 9 has a differentdevice for heating the contents. of the container I l. The heatingdevice of this modified form of the invention comprises a thermal timerunit d3 mounted within outer shell ll beneath the inner shell i5 which.contains the chemical 23 which is to be heated Such thermal timer unitsare generally known those skilled in the art and are available from theGeorge Ulanet Company of 83 East Kinney Street, Newark 5, New Jersey.

As illustrated. in 8 and 9-, the thermal timer unit it has operatingparts enclosed within a casing 56 secured to the bottom wall of theouter shell H by several screws 45. The top wall of the casing 4 isformed with several holes it for the escape of heat. there is a normallyclosed switch composed of a fixed leaf ll and a flexible leaf it whichflexes between open and closed positions in response to increases anddecreases in temperature. When the flexible leaf flexes to an openposition, it contacts an adjustable stop 5d carried by a bracket 5%.Wound upon the fixed leaf 4'! there is a heater coil 32 insulatedelectrically from the leaf #3? but connected electrically to the contactor" that fixed leaf. The other end of the heater coil is in the electriccircuit to be energized. when the switch is closed. The electric cord 33for supplying the required electricity for operation of the thermaltimer unit 43 is projected to th exterior of the rectangular box l9 andis provided with the usual plug 4|. Within the casing 4d of the thermaltimer unit the ends of the electric cord are connected to contacts 53 ofthe unit. Further details of the QUHEitTLlOtiUn and operation of thethermal r timer unit 43 will not be given in this specification suchdetails form no part of the present invention and are generally known bythose skilled in the art.

In all other respects the modified form of the invention is describedabove.

While I have illustrated and described the pref erred ei'nbodiments ofmy invention, it is to be understood that 1' do not limit myself to theprecise construction. herein disclosed and the right is reserved to allchanges and modifications coming within the scope of the invention asdefined in the appended claims.

Having thus described my invention, what I claim as new, and desire tosecure by United States Letters Patent is:

l. A demothing device comprising a plastic supported on short legs andhaving a circular in the top and another in the bottom, a pct reincvablymounted in the top openincluding innei and outer shells and coiltherebetween, manually prese Within the casing 44 within the box andcorner bolts securing together and spacing apart said plates, a strapsecured to the topmost plate by diagonally opposite ones of said bolts,said strap having an upwardly arched center portion atop which saidouter shell sits spaced from the timing device, bolts secured to theends of said strap and extending through the top of the box, meansassociated with said bolts for securing the heating pot removably inplace, and electric circuit means for said coil controlled by saidtiming device.

2. A demothing device comprising a plastic box supported on short legsand having a circular opening in the top and another in the bottom, aheating pot removably mounted in the top opening and including inner andouter shells and a heating coil therebetween, a manually presettabletiming device mounted in the bottom opening and including a pair offrame plates located Within the box and corner bolts securing togetherand spacing apart said plates, a strap secured to the topmost plate bydiagonally opposite ones of said bolts, said strap having an upwardlyarched center portion atop which said outer shell sits spaced from thetiming device, bolts secured to the ends of said strap and extendingthrough the top of the box, nuts drawing up on the last said bolts tosecure the timing device in place, fingers mounted on the last saidbolts beneath said nuts and extending over the rim of the heating pot tosecure the latter removably in place, and electric circuit means forsaid cell controlled by said timing device.

3. A demothing device comprising a plastic box supported on short legsand having a circular opening in the top and another in the bottom, aheating pot remova'bly mounted in the top opening and including innerand outer shells and a heating coi1 therebetween, a manually presettabletiming device mounted in the bottom openand including a pair of frameplates located within the box and corner bolts securing together andspacing apart said plates, a strap secured to the topmost plate bydiagonally opposite ones of said bolts, heat insulative Washers betweensaid strap and said upper plate, said strap having an upwardly archedcenter portion atop which said outer shell sits, the heater thus beingspaced from the timing device, bolts secured to the ends of said strapand extending through the top of the box, nuts drawing up on the lastsaid bolts to secure the timing device in place, electric circuit meansfor said coil controlled by said timing device, and fingers mounted onthe last said bolts beneath said nuts and extending over the rim of saidheating pot to secure the latter removably in place, said fingers havingeach a tail to facilitate disengagement thereof from the heating pot.

MAURICE ABRAMS.

References Cited in the file of this patent UNITED STATES PATENTS

